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Medium-voltage cable accessories

Elbow arresters

Eaton’s Cooper Power series elbow arresters provide shielded deadfront arrester protection with metal oxide varistor elbow and parking stand arresters used in pad-mounted, transformer and entry cabinets, vaults, switching enclosures and other installations. 

Direct Connect 600 amp
50% reduced footprint
Extends cable life
Improved reliability
Overvoltage limitation
Equipment protection

Core features

  • The rubber body is constructed of high-quality precision-molded peroxidecured EPDM insulation and semi-conductive materials
  • The copper alloy probe and probe retainer are connected to the MOV block stack via welded flexible tin-plated copper leads. This ensures that the column cannot be damaged during installation and that a reliable current path to the MOV blocks is maintained
  • The disk column is composed of MOV disks bonded together with high-conductivity, silver-loaded epoxy to yield the most reliable electrical connection and eliminate air voids
  • The #4 AWG flexible copper ground lead, which reliably carries current to ground during voltage surges, is attached to the housing by a brass magneformed end cap
  • The brass end cap provides a tight, weatherproof seal

Reduced size and installation time

Watch this video to see how easy it is to install an elbow arrester.

Engineered to withstand harsh extremes

The POSI-BREAK M.O.V.E. surge arrester combines metal (zinc) oxide varistor technology in a pre-molded rubber elbow to provide overvoltage system protection in an insulated, fully shielded, submersible, deadfront device

Protection for improved system reliability

Elbow arresters are designed for use with standard interfaces to limit overvoltages to acceptable levels, protect equipment and extend cable life.

Reduced size and installation time

Eaton's Cooper Power series 600 A DirectConnect elbow arresters offer a cost-effective design with a shorter stacking height while reducing overall size 50 percent compared to traditional offerings and installation time by 80 percent.
Specifications

Commonly applied voltage ratings of M.O.V.E. and parking stand arresters

System voltage (V rms)
Commonly applied arrester duty-cycle (MCOV) voltage rating (kV rms) on distribution systems
Nominal voltage
Maximum voltage
4-wire multigrounded neutral wye
3-wire low impedance grounded
 Delta and 3-wire high impedance grounded
2400
2540


3 (2.55) 
4160 Y/2400
4400 Y/2540
3 (2.55)
6 (5.1)
6 (5.1) 
4260
4400
– 

6 (5.1) 
4800
5080
– 

6 (5.1) 
6900
7260
– 

9 (7.65)
8320 Y/4800
8800 Y/5080
6 (5.1)
9 (7.65)

12000 Y/6930
12700 Y/7330
9 (7.65)
12 (10.2)

12470 Y/7200
13200 Y/7620
9 (7.65) or 10 (8.4)
15 (12.7)

13200 Y/7620
13970 Y/8070
10 (8.4)
15 (12.7)

13800 Y/7970
14520 Y/8388
10 (8.4) and 12 (10.2)
15 (12.7)

13800
14520

– 
18 (15.3)
20780 Y/12000
22000 Y/12700
15 (12.7)
21 (17.0)

22860 Y/12000
22000 Y/12700
15 (12.7)
21 (17.0)

24940 Y/14400
26400 Y/15240
18 (15.3)
27 (22.0)

27600 Y/15935
29255 Y/16890
21 (17.0)


34500 Y/19920
36510 Y/21080
27 (22.0) or 30 (24.4)


46000 Y/26600
48300 Y/28000
36 (29.0)


M.O.V.E. and parking stand arrester protective characteristics

      Maximum discharge voltage (kV crest) 8/20 µs current wave
Duty cycle voltage rating (kV) 
MCOV (kV) 
Equivalent front-of-wave (kV crest)* 
1.5 kA 
3 kA
5 kA
10 kA
20 kA
3 2.55 11 9 9.7 10.7 11.4 13
6 5.1 22 18.0 19.4 20.8 22.7 26
9 7.65 31.7 26 28 30 32.8 37.4
10 8.4 33 27 29.1 31.2 34.1 38.9
12 10.2 41.5 33.9 36.6 39.2 42.9 48.9
15 12.7 51.8 42.4 45.7 49 53.6 61.1
18 15.3 62.2 50.9 54.9 58.8 64.3 73.4
21 17.0 66 54.0 58.2 62.4 68.2 77.9
24 19.5 77 63.0 67.9 72.8 79.6 90.8
27 22.0 87.2 71.4 76.9 82.4 90.1 103
30 24.4 97.1 79.5 85.7 91.8 100.0 115.0
33 27 108 87.8 95.1 102 112 127
36 29 116 95.3 103 110 120 137
*Equivalent front-of-wave voltage is the expected discharge voltage of the arrester when tested with a 5 kA current surge cresting in 0.5 µs

M.O.V.E. DirectConnect elbow arrester electrical ratings and characteristics

      Maximum discharge voltage 8/20 µs current wave (kV crest)
Duty cycle voltage rating (kV)
MCOV (kV)
Front-of-wave protective level* (kV crest)
1.5 kA
3 kA
5 kA
10 kA
20 kA
27
22.0 105.0 75.0 82.0 87.4 96.2 110.0
30 24.4 112.0 79.5 85.7 91.8 100.0 115.0
33 27 108 87.8 95.1 102 112 127
36 29 116 95.3 103 110 120 137
*Equivalent front-of-wave voltage is the expected discharge voltage of the arrester when tested with a 5 kV current surge cresting in 0.5 µs
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